<template>
  <view :class="[styleType === 'text' ? 'segmented-control--text' : 'segmented-control--button']"
    :style="{ borderColor: styleType === 'text' ? '' : activeColor ,height:height+'px'}" class="segmented-control">
    <view v-for="(item, index) in values" :class="[
				styleType === 'text' ? '' : 'segmented-control__item--button',
				index === 0 && styleType === 'button' && isMyself ? 'segmented-control__item--button--first' : '',
				index === values.length - 1 && styleType === 'button' ? 'segmented-control__item--button--last' : '',
        paddingRL?'my-segmented-control__item':'',
				index !== 0  && isMyself ? 'my-segmented-control__item--button--last' : '',
				isMyself ? 'my-segmented-control__item--button--first' : ''
			]" :key="index" :style="{
				backgroundColor: index === currentIndex && styleType === 'button' ? activeColor : styleType === 'button' ? inActiveColor : 'transparent',
				borderColor: (index === currentIndex && styleType === 'text') || styleType === 'button' ? activeColor : inActiveColor
			,alignItems}" class="segmented-control__item" @click="_onClick(index)">
      <view>
        <text
          :style="{ color: index === currentIndex ? (styleType === 'text' ? activeColor : '#fff') : styleType === 'text' ? '#000' : activeColor }"
          class="segmented-control__text"
          :class="styleType === 'text' && index === currentIndex ? 'segmented-control__item--text' : ''">
          {{ item }}
        </text>
      </view>
    </view>
  </view>
</template>

<script>
  /**
   * SegmentedControl 分段器
   * @description 用作不同视图的显示
   * @tutorial https://ext.dcloud.net.cn/plugin?id=54
   * @property {Number} current 当前选中的tab索引值，从0计数
   * @property {String} styleType = [button|text] 分段器样式类型
   * 	@value button 按钮类型
   * 	@value text 文字类型
   * @property {String} activeColor 选中的标签背景色与边框颜色
   * @property {String} inActiveColor 未选中的标签背景色与边框颜色
   * @property {Array} values 选项数组
   * @event {Function} clickItem 组件触发点击事件时触发，e={currentIndex}
   */

  export default {
    name: 'UniSegmentedControl',
    emits: ['clickItem'],
    props: {
      current: {
        type: Number,
        default: 0
      },
      values: {
        type: Array,
        default () {
          return [];
        }
      },
      isMyself: {
        type: Boolean,
        default: false
      },
      paddingRL: {
        type: Boolean,
        default: false
      },
      height: {
        type: Number,
        default: 36
      },
      alignItems: {
        type: String,
        default: 'center'
      },
      activeColor: {
        type: String,
        default: '#2979FF'
      },
      inActiveColor: {
        type: String,
        default: 'transparent'
      },
      styleType: {
        type: String,
        default: 'button'
      }
    },
    data() {
      return {
        currentIndex: 0
      };
    },
    watch: {
      current(val) {
        if (val !== this.currentIndex) {
          this.currentIndex = val;
        }
      }
    },
    computed: {},
    created() {
      this.currentIndex = this.current;
    },
    methods: {
      _onClick(index) {
        if (this.currentIndex !== index) {
          this.currentIndex = index;
          this.$emit('clickItem', {
            currentIndex: index
          });
        }
      }
    }
  };
</script>

<style lang="scss" scoped>
  .segmented-control {
    /* #ifndef APP-NVUE */
    display: flex;
    box-sizing: border-box;
    /* #endif */
    flex-direction: row;
    // height: 36px;
    overflow: hidden;
    /* #ifdef H5 */
    cursor: pointer;
    /* #endif */
  }

  .segmented-control__item {
    /* #ifndef APP-NVUE */
    display: inline-flex;
    box-sizing: border-box;
    /* #endif */
    position: relative;
    flex: 1;
    justify-content: center;
    // align-items: center;
  }

  // 自定义样式
  .my-segmented-control__item {
    padding: 0 10rpx;
    // flex: initial;
  }

  .segmented-control__item--button {
    border-style: solid;
    border-top-width: 1px;
    border-bottom-width: 1px;
    border-right-width: 1px;
    border-left-width: 0px;
  }

  .segmented-control__item--button--first {
    border-left-width: 1px;
    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
  }

  .my-segmented-control__item--button--first {
    border-radius: 5px;
  }

  .segmented-control__item--button--last {
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
  }

  .my-segmented-control__item--button--last {
    border-radius: 5px;
    border-left-width: 1px;
    margin-left: 18rpx;
  }

  .segmented-control__item--text {
    border-bottom-style: solid;
    border-bottom-width: 2px;
    padding: 6px 0;
  }

  .segmented-control__text {
    font-size: 14px;
    line-height: 20px;
    text-align: center;
  }
</style>